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यदि f(x, y) = xy है तो अवकल df किसके बराबर है?

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  1. xdx + ydy
  2. ydx + xdy
  3. dx + dy
  4. dx - dy

Answer (Detailed Solution Below)

Option 2 : ydx + xdy

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संकल्पना:

यदि z = f(x, y)

तो z में परिवर्तन (कुल अंतर) निम्न होता है

गणना:

दिया हुआ:

z = xy
फिर कुल अंतर है

z = ydx + xdy

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